The retaining bar (fig.5.2A) can now be replaced by sliding it down in its slots as far as possible, and tightening the screws in its ends (fig.5.2B).
5.3Voltage Setting
The system is delivered with the mains transformer wired for 220 Volts AC.
Before attempting to switch on the unit ensure that the voltage is set correctly for your mains supply.
To change the voltage, unplug the long (grey coloured) screw connector block (fig. 5.2X3), and rewire it for the appropriate voltage, shown in the circuit diagram (fig.5.3). Push the connector block firmly back into place. The cover of the Control Centre can now be replaced, and the screws reinserted in the side panels.
48 Volt Emergency Power Supply
In situations where the mains power supply is unreliable, and SM30 is used for security/evacuation purposes, an emergency power supply may be used. This can be switched in automatically whenever the mains power fails.
A
Earth Terminal (ground)
An Earth Terminal (fig.4.3C) is mounted on the Power Supply Module to allow an extra earth (ground) wire to be connected.
This should be used when the Emergency Power Supply is used alone, or when the mains power earth is inadequate.
If audible interference is present in the system, caused by an inadequate, or contaminated earth (e.g. due to heavy equipment using the same common earth), a separate “clean” earth may be connected to the Earth Terminal.
X3 | X3 |
| X 3 |
| X3 |
| R E D |
| R E D | R E D | R E D |
| G R N |
| G R N | G R N | G R N |
| B L K |
| B L K | B L K | B L K |
| Y E L |
| Y E L | Y E L | Y E L |
| BL UE |
| B L U E | BL UE | B L U E |
| B R N |
| B R N | B R N | B R N |
220V- 230V |
| 240V | 127V |
| 110V |
Fig. 5.2 - Top view
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